Here's what the state's districts have looked like for the past decade:

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Here's what they'll look like starting next year:

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The reason for the change is the bump in population reflected in the recent Census. Most of the growth was on the West Side, which is the reason for that strange Eighth District crawling over the Cascades. (Spokane's City Council districts, and the boundaries for county commissioners, are also changing.)

It's unclear how the change will affect the voting patterns of McMorris Rodgers district, but a quick read could say the proportion of left-leaning voters might have increased a smidge. But given the congresswoman's blowout wins the last couple of cycles, she's probably safe.